After longer start (spinning excellent) wakes alive "low" and just few seconds runs poor low rpm and then settles down to normal idle.But starting may be 3-4 seconds or more without response first time, that feels soooo long that I usually make a second start with opening throttle .

Compared to usual start as cold or short stop, I just push button and it fires up right away and no need to give throttle.

So I think it is the heat what causes something to carbs/fuel when it sits longer time.I thought few ways to test when next time comes; 2 throttle twist before start => acc.pump squirts fuel => then start as usual, or open some throttle and hit start button.

Maybe its just to understand better her behavior to fire up... just like with wife (still after 23 years marriage)